I have a note of an Ann Glendinning was born in 1811, who married Henderson Black Douglas in 1827, at age 16. Henderson was born in 1808, in Ayrshire, Scotland. They had 2 daughters, Jane (later Millar) and another
There are some Douglases whose forenames include Black in my database. I wonder if there is a connection? https://goo.gl/fmBYnm
I think that Henderson may have been a son of Samuel Douglas and Jane Toal (Towel) (Tole), but have seen no evidence. That would make him (probably) a brother to David Douglas born 12 May 1798 who married Catherine Baird (born 2 Feb 1814) on 27 Dec 1833.
David Douglas born 12 May 1798 Married to Catherine Baird on 27 Dec 1833 she was born 2 Feb 1814. their children were Jean(Jane) born 28 July Dundonald, Robert b. o1 Feb 1836 Dundonald, Catherine D. b 1837, David Wilson born 3 Sept 1838 , Thomas B. b 7 Aug 1840 Mary born 29 May 1842 Kilwinning, Alexander G. b 15 May 1844 Kiliwinning, John H, b 13 Jan 1846 Kilwinning, and Robert b 13 May 1848 in Kilwinning.
The more information you can give about the people you mention, the more chance there is of someone else connecting with your family.
Dates and places of births, deaths and marriages all help to place families.
Professions also help.
'My great-grandmother mother was a Douglas from Montrose' does not give many clues to follow up! But a bit of flesh on the bones makes further research possible. But if we are told who she married, what his profession was and where the children were baptised, then we can get to work.
Maybe it is time to update the information in your profile?